Communicator Debugger

--Debug Communicator
rednet.open("back");

while true do
    shell.run("clear");
    print("==========================");
    io.write("Protocol: ");
    local protocol = io.read();
    local lookup;
    local address;
    if protocol ~= "" then
        io.write("Lookup Name: ");
        lookup = io.read();
        if lookup ~= "" then
            address = rednet.lookup(protocol, lookup);
            if address == nil then
                print("Error Finding Address through Lookup. Input it Manually, or skip to broadcast.")
            end
        end
    end
    if address == nil then
        io.write("Computer Address: ");
        address = io.read();
    end
    io.write("Message: ");
    local message = io.read();
    print("==========================")
    if message ~= "" then
        if protocol == "" then
            if address == "" then
                rednet.broadcast(message);
            else
                rednet.send(address, message);
            end
        else
            if address == "" then
                rednet.broadcast(message, protocol);
            else
                rednet.send(address, message, protocol);
            end
        end
        local returnMessage, from;
        if protocol == "" then
            from, returnMessage = rednet.receive(5);
        else
            from, returnMessage = rednet.receive(protocol, 5);
        end
        if from ~= nil then
            print("From: " .. from);
            print("=========================")
            print(returnMessage);
            print("=========================")
        else
            print("Recieved Nothing.")
        end
        io.read();
    end
    sleep(0);
end